EVICTION_SHIFT    172 mm/workingset.c #define EVICTION_MASK	(~0UL >> EVICTION_SHIFT)
EVICTION_SHIFT    542 mm/workingset.c 	BUILD_BUG_ON(BITS_PER_LONG < EVICTION_SHIFT);
EVICTION_SHIFT    550 mm/workingset.c 	timestamp_bits = BITS_PER_LONG - EVICTION_SHIFT;